Is CVE-2022-43391 actively exploited?

CVE-2022-43391 has no public evidence of in-the-wild exploitation as of 2026-02-25.

What is the CVSS score for CVE-2022-43391?

CVE-2022-43391 has a CVSS score of 6.5 (MEDIUM severity). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

How do I patch CVE-2022-43391?

Patch guidance is available from zyxel security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2022-43391.

CVE-2022-43391 - remediation guidance & executive summary

Q: Which products are affected by CVE-2022-43391?

48 products: zyxel lte3301-plus firmware, zyxel lte5388-m804 firmware, zyxel lte5398-m904 firmware, zyxel lte7240-m403 firmware, zyxel lte7461-m602 firmware, and 43 more.

Description

A buffer overflow vulnerability in the parameter of the CGI program in Zyxel NR7101 firmware prior to V1.15(ACCC.3)C0, which could allow an authenticated attacker to cause denial-of-service (DoS) conditions by sending a crafted HTTP request.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector: network
Complexity: low
Privileges: low
User Action: none
Scope: unchanged
Confidentiality: none
Integrity: none
Availability: high
Weaknesses: CWE-120 CWE-120

Metadata

Primary Vendor: ZYXEL
Published: 1/11/2023
Last Modified: 2/25/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

zyxel : lte3301-plus_firmwarezyxel : lte5388-m804_firmwarezyxel : lte5398-m904_firmwarezyxel : lte7240-m403_firmwarezyxel : lte7461-m602_firmwarezyxel : lte7480-m804_firmwarezyxel : lte7480-s905_firmwarezyxel : lte7485-s905_firmwarezyxel : lte7490-m904_firmwarezyxel : nebula_lte3301-plus_firmwarezyxel : nebula_lte7461-m602_firmwarezyxel : nebula_nr5101_firmwarezyxel : nebula_nr7101_firmwarezyxel : nr5101_firmwarezyxel : nr7101_firmwarezyxel : nr7102_firmwarezyxel : dx3301-t0_firmwarezyxel : dx4510-b1_firmwarezyxel : dx5401-b0_firmwarezyxel : emg3525-t50b_firmwarezyxel : emg5523-t50b_firmwarezyxel : emg5723-t50k_firmwarezyxel : ex3301-t0_firmwarezyxel : ex3510-b0_firmwarezyxel : ex5401-b0_firmwarezyxel : ex5501-b0_firmwarezyxel : ex5510-b0_firmwarezyxel : ex5512-t0_firmwarezyxel : ex5600-t1_firmwarezyxel : ex5601-t0_firmwarezyxel : ex5601-t1_firmwarezyxel : vmg3927-t50k_firmwarezyxel : vmg4005-b50a_firmwarezyxel : vmg4005-b60a_firmwarezyxel : vmg8623-t50b_firmwarezyxel : vmg8825-t50k_firmwarezyxel : ax7501-b0_firmwarezyxel : pm3100-t0_firmwarezyxel : pm5100-t0_firmwarezyxel : pm7300-t0_firmwarezyxel : pm7320-b0_firmwarezyxel : pmg5317-t20b_firmwarezyxel : pmg5617-t20b2_firmwarezyxel : pmg5617ga_firmwarezyxel : pmg5622ga_firmwarezyxel : wx3100-t0_firmwarezyxel : wx3401-b0_firmwarezyxel : wx5600-t0_firmware

Remediation Guidance

Executive Summary

View on NIST NVD